Electric heater



No. 820,720. I Patented Mar. 7, I899. R. A. PARKER.

ELECTRIC HEATER.

(Application filed Oct. 2, 1895.)

(No Model.)

UNITED STATES PATENT OFFICE.

RALZEMOND A. PARKER, OF DETROIT, MICHIGAN, ASSIGNOR TO THE CON- SOLIDATED OAR-HEATING COMPANY, OF ALBANY, NEW YORK.

ELECTRIC HEATER;

SPECIFICATION forming part of Letters Patent No. 620,720, dated March 7, 1899.

Application filed October 2, 1895 To aZZ whom it may concern/.

Be it known that I, RALZEMOND A. PARKER, a citizen of the United States, residing in the city of Detroit, county of lVayne, State of Michigan, have invented a new and useful Improvement in Electric Heaters, of which the following is a specification.

My invention relates to electric heaters; and it has for its object the construction of a heater that shall be simple, effectual, cheap to construct, and not liable to get out of order. I attain these objects by the means hereinafter shown and claimed, in which Figure 1 is an elevation of a heater constructed according to my system. Fig. 2 is a section on line X X of Fig. 1. Fig. 3 is a sectional View on line Y Y.

Similar letters refer to similar parts.

In the drawings, A A are the base and cap of the framework designed to support the resistancein the manner hereinafter described.

B B are bolts connecting the bottom and cap A A together.

0 O are insulated standards, which insulators may be of porcelain, asbestos, or any other insulating material, which is also refractory to heat. They may be made in their whole length in one piece, as is shown in Fig. 3, which is a view from the left of the edges of one of these forms, or they may be made in sections built up and sustained by the through-bolts b b. It is obvious that the straining of the nuts on these bolts 1) I) would force the cap and the bottom against the insulating-blocks C, and thus firmly bind the whole together. These blocks 0 have upon opposite sides alternating grooves c 0 deep enough to sustain the resistance-coil D. The resistance-coil is woven in and around the insulating-blocks in the manner shown in Fig. 1, its coils lying within the grooves c c, which under the strain which may be put upon it retain it in position. The end insulating-blocks may be made round, with the grooves extending spirally around them, and in which the resistance-coil can be placed. The resistance-coil is of wire in the form of a spiral spring and preferably extends Without Serial No. 564,371. (No model.)

ance, there being no portion of it which is separately strained and attached in any mannor to the insulating-supports.

The base-piece A and top cap A may be made of wood or any other suitable material insomuch as their only ofiice is simply to bind and hold the resistances in place. Any numher of these heaters may be coupled together in any relation, and by appropriate switches the relation can be changed in the manner heretofore well understood.

Another important object which is secured is that the resistance in the form of a coiled wire presents a greater amount of wiring to the atmosphere Without being in contact with the supporting devices than any other form now known, and thus affords a freer circulation of air than has heretofore been secured.

Having thus described my invention, what I claim is In an electric heater, the combination of a series of insulating-supports constructed to. hold a coiled resistance-wire out of contact with adjacent coils, means for holding the supports in position, a spring-coiled resistance-wire secured to one of said supports, and passing alternately over and under the inter- '85 vening supports until it reaches the last support of the series, about which it passes, and returning, continues in like manner until the Wire has continuously passed from one end of said supports to the other, thus interweav- 9o ing the wire about said supports,substantially as described.

RALZEMOND A. PARKER.

Witnesses H. J. NODINE, G. H. DIAOK. 

